Massive conversion from Package to AutotoolsPackage (#2845)

* Massive conversion from Package to AutotoolsPackage

* Forgot to convert p4est to AutotoolsPackage

* Fix typo

* Fix broken link in docs

var/spack/repos/builtin/packages/lwgrp/package.py

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class Lwgrp(Package):
+class Lwgrp(AutotoolsPackage):
     """Thie light-weight group library provides process group
        representations using O(log N) space and time."""
 
@@ -35,8 +35,3 @@ class Lwgrp(Package):
     version('1.0.2', 'ab7ba3bdd8534a651da5076f47f27d8a')
 
     depends_on('mpi')
-
-    def install(self, spec, prefix):
-        configure("--prefix=" + prefix)
-        make()
-        make("install")